9989730 has 48 divisors (see below), whose sum is σ = 26941824. Its totient is φ = 2663280.

The previous prime is 9989729. The next prime is 9989737. The reversal of 9989730 is 379899.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (9989737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 375 + ... + 4485.

It is an arithmetic number, because the mean of its divisors is an integer number (561288).

Almost surely, 2^9989730 is an apocalyptic number.

9989730 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9989730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13470912).

9989730 is an abundant number, since it is smaller than the sum of its proper divisors (16952094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9989730 is a wasteful number, since it uses less digits than its factorization.

9989730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133 (or 4121 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 9989730 is about 3160.6534134574. The cubic root of 9989730 is about 215.3696902596.

The spelling of 9989730 in words is "nine million, nine hundred eighty-nine thousand, seven hundred thirty".